I am new to animations. I have a spin Animation on a button. The problem is when that button animation is executed the button intersects other buttons in the layout. So during animation the moving button cannot be seen since it is being covered up by other buttons. Any idea on how to make my animation stay on the top layer of the layout? I would like to figure out a solution that is API 8 compatible.
//create shake animation
final Animation shakeIt = AnimationUtils.loadAnimation(this, R.anim.shake);
findViewById(R.id.button_spin).startAnimation(shakeIt);
// use shake animation
spinnerButton.startAnimation(shakeIt);
EDIT: (here is a lot more info)
So i have played with it over the past few hours and discovered some more things. Lecho intuition is correct, the z order is the driving factor in whether a widget goes "above" or "below" another one. The problem I am facing is could be because of two things:
The button that is at the front of view view (and i want to move it back) has text that is edited near the end of the activity. Does adding text forcing the widget to redraw change the Z order of that view???
The button text is changed in the onResume() and it seems that I'm not able to change the Z-order of the buttons in that method???
answers to these above 2 questions would solve my problem
Edit 2: XML in question
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/bg"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight=".7"
android:layout_marginTop="5dp" >
<Button
android:id="#+id/categoryButton"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/drop"
android:prompt="#string/planet_prompt"
android:paddingRight="20dp"
android:textColor="#000000"
android:textStyle="bold"
android:textSize="35dp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.1"
android:orientation="horizontal" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:layout_weight="1.5" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_weight="1" >
</LinearLayout>
<Button
android:id="#+id/button_spin"
android:layout_width="0dp"
android:layout_weight="2.35"
android:layout_height="fill_parent"
android:background="#drawable/letseat"
android:layout_gravity="center_horizontal"
android:gravity="center" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_weight="1" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
android:orientation="vertical">
<Button
android:id="#+id/button_additems"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_width="match_parent"
android:background="#drawable/add_rest"
android:gravity="center_horizontal" />
<Button
android:id="#+id/button_showrestaurant"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_width="match_parent"
android:background="#drawable/edit_rest"
android:gravity="center_horizontal" />
<Button
android:id="#+id/button_nearbyplaces"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_width="match_parent"
android:background="#drawable/whats_near"
android:gravity="center_horizontal" />
</LinearLayout>
</LinearLayout>
Just my idea. In android z-order is determined by order in which views are added to XML. Maybe animated button was added to xml before the other one so it is "deeper". Try to put animated button later in XML or use method bringChildToFront(buttonView) on your layout or add your button to layout from code.
Edit:
Ad 1. Adding text seems to not change the Z order. When I change text and call button.bringToFront() the Z order is changed but not when I call bringToFront() or setText() alone.
Ad 2. In onResume adding text doesn't change Z order but method bringToFront() seems to works as expected.
I am not able to test those methods together with view animation right now.
Test activity:
public class MainActivity extends Activity {
private int i = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button btn1 = (Button) findViewById(R.id.btn1);
final Button btn2 = (Button) findViewById(R.id.btn2);
btn2.bringToFront();
final Button btn3 = (Button) findViewById(R.id.btn3);
btn3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if ((i % 2) == 0) {
final Button btn1 = (Button) findViewById(R.id.btn1);
btn1.setText("BUTTON_BLACK_NEW");
btn1.bringToFront();
} else {
final Button btn2 = (Button) findViewById(R.id.btn2);
btn2.setText("BUTTON_GREY_NEW");
btn2.bringToFront();
}
++i;
}
});
}
#Override
protected void onResume() {
super.onResume();
if ((i % 2) == 0) {
final Button btn1 = (Button) findViewById(R.id.btn1);
btn1.bringToFront();
} else {
final Button btn2 = (Button) findViewById(R.id.btn2);
btn2.bringToFront();
}
++i;
}
}
Layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="#+id/main_layout">
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/black"
android:text="BUTTON_BLACK"
android:textColor="#android:color/white" />
<Button
android:id="#+id/btn2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/darker_gray"
android:text="BUTTON_GREY"
android:textColor="#android:color/black" />
<Button
android:id="#+id/btn3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="CHANGE_Z"
android:layout_below="#+id/btn2" />
</RelativeLayout>
Related
I used a SlidingDrawer like in this tutorial
It works in a LinearLayout, but there is always a whitespace depending of the hight of the slider and all other stuff show up below the whitespace.
The soloution should be to use a Relative Layout. This deletes the whitespace but the handlerbutton from the slider seems to be under the content in the scrollview and don't do anything by clicking on it. See the screenshot
MainActivity.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/tbar"
layout="#layout/primerdivisor" />
<SlidingDrawer
android:id="#+id/SlidingDrawer"
android:layout_width="wrap_content"
android:layout_height="150dp"
android:content="#+id/contentLayout"
android:handle="#+id/slideButton"
android:orientation="vertical"
android:padding="10dip"
android:rotation="180">
<!-- Handle button -->
<Button
android:id="#+id/slideButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/button_selector"
android:ems="10"
android:rotation="180"
android:text="Show" android:clickable="true"/>
<!-- Content Layout -->
<LinearLayout
android:id="#+id/contentLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#FFCC"
android:gravity="center"
android:orientation="vertical"
android:padding="10dip">
<Button
android:id="#+id/Button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp"
android:background="#drawable/button_selector"
android:text="Button 1"
android:textColor="#color/textBlack" />
<TextView
android:id="#+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="2dp"
android:background="#drawable/button_selector"
android:gravity="center"
android:padding="5dp"
android:text="Text View Item"
android:textColor="#color/textBlack" />
</LinearLayout>
</SlidingDrawer>
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:orientation="vertical">
....
MainActivity.java
...
private void createSlider(){
slideButton = (Button) findViewById(R.id.slideButton);
slidingDrawer = (SlidingDrawer) findViewById(R.id.SlidingDrawer);
b1 = (Button) findViewById(R.id.Button01);
textView = (TextView) findViewById(R.id.text);
// Setting Listeners to all buttons and textview
setListeners();
// Listeners for sliding drawer
slidingDrawer.setOnDrawerOpenListener(new OnDrawerOpenListener() {
#Override
public void onDrawerOpened() {
// Change button text when slider is open
Log.i("----","blaaaaaa open");
slideButton.setText("Close");
}
});
slidingDrawer.setOnDrawerCloseListener(new OnDrawerCloseListener() {
#Override
public void onDrawerClosed() {
// Change button text when slider is close
slideButton.setText("Open");
}
});
}
// Listeners method
void setListeners() {
b1.setOnClickListener(this);
textView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// Toast shown on sliding drawer items click
if (v.getId() == R.id.text) {
Toast.makeText(MainActivity.this, textView.getText() + " Clicked",
Toast.LENGTH_SHORT).show();
} else {
Button b = (Button) v;
Toast.makeText(MainActivity.this, b.getText() + " Clicked",
Toast.LENGTH_SHORT).show();
}
}
...
The slider should overlap the scrollview when its whiped out
In view hierarchy terms, views defined at the beginning of your layout XML are "deeper" than those defined later.
In your case your ScrollView is added to the hierarchy after your SlidingDrawer so what your seeing is to be expected.
Move your SlidingDrawer to below your ScrollView and it should be above it.
I have an OnClickListener that listens to Button A clicks. I also have 2 TextViews below the Button.
I want that on every click on Button A, the 2 TextViews will switch their places between them, like this:
Before clicking:
TextView A
TextView B
After clicking:
TextView B
TextView A
How can I do it? Is there a special function that meant to do that? or some kind of a trick? Thanks!
actvity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="start"
tools:context="com.intap.tof.MainActivity">
<TextView
android:id="#+id/txtA"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp"
android:visibility="visible"/>
<TextView
android:id="#+id/txtB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_below="#+id/txtA
android:layout_marginTop="83dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:visibility="visible"
android:textSize="20dp" />
</RelativeLayout>
MainActivity.java:
txtA = (TextView) findViewById(R.id.txtA);
txtB = (TextView) findViewById(R.id.txtB);
float mAX = txtA.getX();
float mAY = txtA.getY();
float mBX = txtB.getX();
float mBY= txtB.getY();
txtA.setX(mBX);
txtA.setY(mBY);
txtB.setX(mAX);
txtB.setY(mAY);
Trick is changing the x and y axis of both views :
Your xml code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="start"
tools:context="com.intap.tof.MainActivity">
<TextView
android:id="#+id/txtA"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="20dp"
android:text="A"
android:tag="A"
android:clickable="true"
android:visibility="visible"/>
<TextView
android:id="#+id/txtB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_below="#+id/txtA"
android:text="B"
android:tag="B"
android:clickable="true"
android:layout_marginTop="83dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:visibility="visible"
android:textSize="20dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="switch"
android:id="#+id/btn1"
android:onClick="onClickButton"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
Java Code :
public class MainActivity extends Activity {
TextView txtA,txtB;
boolean _isOnTxtA;
Button btn1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtA = (TextView)findViewById(R.id.txtA);
txtB = (TextView)findViewById(R.id.txtB);
btn1 = (Button)findViewById(R.id.btn1);
}
public void onClickButton(View v)
{
float mPos1x,mPos1y,mPos2x,mPos2y;
mPos1x = txtB.getX();
mPos1y = txtB.getY();
mPos2x = txtA.getX();
mPos2y= txtA.getY();
if(_isOnTxtA)
{
txtB.setX(mPos2x);
txtB.setY(mPos2y);
txtA.setX(mPos1x);
txtA.setY(mPos1y);
_isOnTxtA = false;
}
else
{
txtB.setX(mPos2x);
txtB.setY(mPos2y);
txtA.setX(mPos1x);
txtA.setY(mPos1y);
_isOnTxtA= true;
}
}
}
View.bringToFront method may be useful.
Where your layout is like:
<LinearLayout>
<TextView A>
<TextView B>
</LinearLayout>
To call bringToFront on TextView A will bring it front (the last position in the parent LinearLayout).
<LinearLayout>
<TextView B>
<TextView A>
</LinearLayout>
For more detailed example, below is layout.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/text_holder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:id="#+id/text_a"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/text_a" />
<TextView
android:id="#+id/text_b"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/text_b" />
</LinearLayout>
In your OnClickListener (in your Activity) call:
View textViewA = findViewById(R.id.text_a);
textViewA.bringToFront();
This should work.
Toggling behavior can be achieved by this application. For example:
ViewGroup textHolder = (ViewGroup) findViewById(R.id.text_holder);
textHolder.getChildAt(0).bringToFront();
ViewGroup.getChildAt(0) always returns the first child of the ViewGroup. So everytime you call bringToFront on the first child will be bring to front.
All previous answers do not work because you use a relative layout where a linear layout will suffice.
If you have to go RelativeLayout, do the following in your click listener
TextView textA = (TextView) findViewById(R.id.txtA);
TextView textB = (TextView) findViewById(R.id.txtB);
RelativeLayout.LayoutParams textALayoutParams = (RelativeLayout.LayoutParams) textA.getLayoutParams();
textALayoutParams.addRule(RelativeLayout.BELOW, R.id.txtB);
textA.setLayoutParams(textALayoutParams);
RelativeLayout.LayoutParams textBLayoutParams = (RelativeLayout.LayoutParams) textB.getLayoutParams();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
textBLayoutParams.removeRule(RelativeLayout.BELOW);
} else {
textBLayoutParams.addRule(RelativeLayout.BELOW,0);
}
textB.setLayoutParams(textBLayoutParams);
This will place A under B. You can do the same for reversing.
For example. There is picture on the top of the screen below that there are some empty boxes and below the boxes there are some buttons. Every button has a character for text("a","c","t"). You click on a button and the button's text appear in the box. You can click them in the order you want to but the answer is "cat" so when you put the characters in the correct order then you got a toast.
I tried to do it with TextViews and Buttons. I can make the button disappear when i click on it and a textview appear in the same time. But every textview has a fix place on the screen, so i need to put every character in every box invisible and when i click on the "c" character it appear in the first box and the other "c" characters stay invisible. But if i click on the "a" first, then it appears in the second box because there is too much variation to do all. I'm not good at explaining but if anyone has an idea how to do that easier please response!
Here is my code:
public class MainActivity extends ActionBarActivity implements OnClickListener{
Button b1;
Button b2;
Button b3;
TextView tg1;
TextView tg2;
TextView tg3;
TextView to1;
TextView to2;
TextView to3;
TextView tl1;
TextView tl2;
TextView tl3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button)findViewById(R.id.bg);
b1.setOnClickListener(this);
b2 = (Button)findViewById(R.id.bo);
b2.setOnClickListener(this);
b3 = (Button)findViewById(R.id.bl);
b3.setOnClickListener(this);
tg1 = (TextView)findViewById(R.id.tg1);
tg2 = (TextView)findViewById(R.id.tg2);
tg3 = (TextView)findViewById(R.id.tg3);
to1 = (TextView)findViewById(R.id.to1);
to2 = (TextView)findViewById(R.id.to2);
to3 = (TextView)findViewById(R.id.to3);
tl1 = (TextView)findViewById(R.id.tl1);
tl2 = (TextView)findViewById(R.id.tl2);
tl3 = (TextView)findViewById(R.id.tl3);
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.bg:
b1.setVisibility(View.INVISIBLE);
tg1.setVisibility(View.VISIBLE);
tg2.setVisibility(View.INVISIBLE);
tg3.setVisibility(View.INVISIBLE);
break;
case R.id.bo:
b2.setVisibility(View.INVISIBLE);
to2.setVisibility(View.VISIBLE);
to1.setVisibility(View.INVISIBLE);
to3.setVisibility(View.INVISIBLE);
break;
case R.id.bl:
b3.setVisibility(View.INVISIBLE);
tl3.setVisibility(View.VISIBLE);
tl2.setVisibility(View.INVISIBLE);
tl1.setVisibility(View.INVISIBLE);
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="hu.szada.gombokelso.MainActivity"
android:orientation="horizontal">
<TextView
android:id="#+id/tl1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:visibility="invisible"
android:text="l"/>
<Button
android:id="#+id/bo"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="86dp"
android:onClick="onClick"
android:text="o" />
<Button
android:id="#+id/bl"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignBaseline="#+id/bg"
android:layout_alignBottom="#+id/bg"
android:layout_alignParentLeft="true"
android:layout_marginLeft="36dp"
android:onClick="onClick"
android:text="l" />
<Button
android:id="#+id/bg"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_marginRight="14dp"
android:layout_toLeftOf="#+id/bo"
android:onClick="onClick"
android:text="g" />
<TextView
android:id="#+id/tg1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl"
android:layout_alignBottom="#+id/tl"
android:layout_alignLeft="#+id/tl"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/to1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl"
android:layout_alignBottom="#+id/tl"
android:layout_alignLeft="#+id/tl"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />
/// Second
<TextView
android:id="#+id/to2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl1"
android:layout_alignBottom="#+id/tl1"
android:layout_marginLeft="19dp"
android:layout_toRightOf="#+id/tl1"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />
<TextView
android:id="#+id/tg2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignLeft="#+id/to2"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/tl2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignRight="#+id/to2"
android:layout_weight="1"
android:visibility="invisible"
android:text="l" />
/// Third
<TextView
android:id="#+id/tg3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignRight="#+id/bl"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/tl3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tg3"
android:layout_alignBottom="#+id/tg3"
android:layout_alignLeft="#+id/tg3"
android:layout_weight="1"
android:visibility="invisible"
android:text="l" />
<TextView
android:id="#+id/to3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tg3"
android:layout_alignBottom="#+id/tg3"
android:layout_toRightOf="#+id/tl3"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />
You might want to try a slightly different approach.
If I understand you correctly, you want to "type" a word out using given lettered buttons. Like one of those hangman style games.
Why not append the text views on the fly.
Something like
#Override
public void onClick(View v) {
//Grab the surrounding layout for the textviews
GridView answerGrid = (GridView)getViewById(R.id.answerGrid);
//Get the text that was on the button
Button b = (Button)v;
String btnText = b.getText().toString();
//Make a text view with text
TextView txt = new TextView();
text.setText(btnText);
//Append to text view container
answerGrid.addView(txt);
//Invisible button
b.setVisibility(View.INVISIBLE);
}
Haven't tested to see if this is perfect, but its a start.
=====
I've looked at your xml
Why not use GridViews?
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
....>
<GridView android:id="#+id/answerGrid"
....>
<!-- Put nothing here. This is for answers -->
</GridView>
<GridView android:id="#+id/lettersGrid"
android:layout_below="answerGrid"
....>
<!-- Buttons in here -->
</GridView>
</RelativeLayout>
This way you can customise the number of rows/columns based on the length of the word you're playing with. And GridView will automatically give you a neat layout and spacing.
Have a look at the GridView doc and get it customised the way you want it.
See my edits above for the Java code.
Hello I am really new on android development and I would like to ask a simple question.
I have a button (buttonR2C1).
When I click the buttonR2C1 I change the text of my textView (the textview is included inside a scrollView).The problem is that the position of the scrollView remains the same.
I would like to add an action that brings my ScrollView in position 0,0 by using the scrollTo action.
Can anyone help me achieve this?
.java
final TextView tv2 = (TextView) findViewById(R.id.mainL1R2);
final Button button1 = (Button) findViewById(R.id.buttonR2C1);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
tv2.setText(getResources().getString(R.string.L1R2C1));
}
});
.xml
<Button
android:id="#+id/buttonR2C1"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Capitolo 1"
android:textSize="18sp" />
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="300dp"
android:orientation="vertical" >
<TextView
android:id="#+id/mainL1R2"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:fontFamily="CustomText"
android:gravity="left"
android:scrollHorizontally="true"
android:text="#string/L1R2C1"
android:textSize="20sp"
android:textStyle="normal" />
You have to use the scrollTo method of the ScrollView, not the TextView, like
final ScrollView scr = (ScrollView) findViewById(R.id.scrollView1);
scr.scrollTo(x, y);
To scroll exactly to your TextView, you'll have to get the position of the TextView.
Have a look at this answer.
Hi all i have updated my post to show the full xml file, which will show if i am doing something wrong.
i implemented a custom dialog with an edit text field and it keeps crashing. I will
also like to access the values filled in the text field. Any idea where i am going wrong? Thanks.
Below is the offending/troublesome??? code
First i show the xml file which contains my layout for the alert dialog.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="wrap_content">
<ImageView android:id="#+id/ImageView01"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_centerHorizontal="true" />
<ScrollView android:id="#+id/ScrollView01"
android:layout_width="wrap_content" android:layout_below="#+id/ImageView01"
android:layout_height="200px">
<TextView android:text="#+id/TextView01" android:id="#+id/TextView01"
android:layout_width="wrap_content" android:layout_height="wrap_content" />
<EditText
android:id="#+id/lastname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="blah"
/>
</ScrollView>
<Button android:id="#+id/Button01"
android:layout_below="#id/ScrollView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="Cancel" />
</RelativeLayout>
Then main activity file which implements
my button click events...etc.
.......
setContentView(R.layout.main);
//this button will show the dialog
Button button1main = (Button) findViewById(R.id.Button01main);
button1main.setOnClickListener(new View.OnClickListener() {
public void onClick(View OnClickListener) {
//set up dialog
final Dialog dialog = new Dialog(MoredialogActivity.this);
dialog.setContentView(R.layout.maindialog);
dialog.setTitle("This is my custom dialog box");
dialog.setCancelable(true);
TextView text = (TextView) dialog.findViewById(R.id.TextView01);
text.setText(R.string.lots_of_text);
//set up image view
ImageView img = (ImageView) dialog.findViewById(R.id.ImageView01);
img.setImageResource(R.drawable.icon);
//set up button
Button button = (Button) dialog.findViewById(R.id.Button01);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
dialog.dismiss();
//finish();
}
});
dialog.show();
}
});
}
}
You have two items in your ScrollView. According to the doc :
A ScrollView is a FrameLayout, meaning you should place one child in
it containing the entire contents to scroll; this child may itself be
a layout manager with a complex hierarchy of objects.
So you should had another layout, like a linear layout :
<ScrollView
android:id="#+id/ScrollView01"
android:layout_width="wrap_content"
android:layout_below="#+id/ImageView01"
android:layout_height="200px">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:text="#+id/TextView01"
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:id="#+id/lastname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="blah" />
</LinearLayout>
</ScrollView>